Insofar as Cults and Temples, I'm still moving forward apace with it, though a lot of my time has been devoted to improving my Latin, beginning to comprehend German, and studying for the GREs (and if anyone knows of any really good Latin resources, I could certainly use them). That means that, yes, my work on the Cults book has been a lot slower than normal. I still have very little art for the boxed set, which means it is increasingly looking like it won't be done before the end of the year, but such is life, particularly when your artists are unpaid and working solely in their free time. Cryo, Tallstaff, this is not an admonition... (but it totally is)
Another little blurb of information--here are four things to use in your games.
Sacculae -- "coin sacks," are classical/medieval bags or chests. It's not VERY clear what they looked liked structurally, but they apparently have spaces for different coins, perhaps small books, and certainly wax tablets. These are either shelves or compartments.
Armarius (armarii) -- These are architectural features—inset arched niches with heavy shelves that make up part of a wall and are used to store codex manuscripts. Wizards probably have a lot of these, and they are way more common than free-standing bookshelves (though free-standing scroll cases are to be found in many libraries).
Arca -- Chests. Arcae are also known as "strongboxes" or even "arks." They're usually flat-topped and often banded with iron. Yeah, you can just call 'em chests with flat tops, but why not call 'em arcae instead? Yeah, you love that latin, you filthy bitch.
Wax tablets -- the most common writing surface in a world where books are made out of expensive dead animals. Everyone who's anyone that needs to frequently erase should be writing on wax tablets. Everything from keeping house accounts to the party inventory! They're usually kept inside wooden trays, so you can make a little book of them.